一种基于投影寻踪的航天器健康评估方法

摘要

针对常用健康评估方法在航天器测控管理领域应用过程中出现的通用性、易用性和适用性方面的不足,提出了一种基于投影寻踪评估模型的航天器健康评估方法.该方法首先计算得出分系统运行状态的可信度;然后利用卫星故障预案和故障实例构建投影寻踪评估模型,自动获取运行状态指数评价权重;最后通过构建等级评价标准对航天器健康状态进行评估.以某在轨卫星为例进行仿真测试,验证结果显示该方法所构建模型简便且易于升级维护,评估结果与实际情况吻合,对解决实际的工程问题具有实用价值.%To overcome shortcomings in generality,usability and adaptability of common health assessment methods applied to spacecraft control management,a method of spacecraft health assessment based on projection pursuit algorithm is proposed in this paper.In the method,status index of subsystems scaled by certainty factor are calculated at first.Then,weight coefficient of status index is acquired from projection pursuit state evaluation model which is based on preliminary restoration schemes and in-orbit fault case.In the end,spacecraft health status is assessed by setting grading standard.The simulation results of one satellite in-orbit show that the state evaluation Model proposed in this method is convenient to establish and maintain,and assessment results conform to reality,which is useful to solve project practice problem.